package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    //1:分类分页查询
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        //创建分类的类
        Category category = new Category();
//        //对象属性拷贝
//        BeanUtils.copyProperties(categoryPageQueryDTO,category);
        //使用小插件把limit自动写 --- 写入参数  -- 页面， -- 每页记录数
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = page.getTotal();
        List<Category> result = page.getResult();
        return new PageResult(total,result);
    }

    //2:新增分类
    @Override
    public void add(CategoryDTO categoryDTO) {
        Category category = new Category();
        //对象属性拷贝
        BeanUtils.copyProperties(categoryDTO,category);
        //分类状态默认为禁用状态0
        category.setStatus(StatusConstant.DISABLE);
        //关于创建时间更新时间
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        //关于创建人/修改人
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.add(category);
    }

    //3：启用禁用分类
    @Override
    public void startOrStop(Integer status, Long id) {
        //为了提高扩展性，传入一个对象category
        Category category = Category.builder()
                .status(status)
                .id(id)
                .build();
        //用SQL语句
        categoryMapper.update(category);
    }

    //4:根据ID删除分类
    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.deleteById(id);
    }

    //5：根据类型查询分类
    @Override
    public List<Category> find(Integer type) {
        return categoryMapper.find(type);
    }

    //6:修改分类
    @Override
    public void put(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //修改修改的时间
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }
}
